Combination crusher and mill



WITNESSES H. LOEVEN.

COMBINATION CRUSHER AND MILL.

APPLICATION FILED JULY '14. 1919.

Patented Mar. 14,1922.

2 SHEETS-SHEET 1.

' NTOR lid/r2291;08 1/8714 3244a A TTORIVEYS WITNESSES H. LOEVEN.

COMBINATION CRUSHER AND MILL. APPLICATIONVFILEDJULQY 14, 1919.

Patented Mar. 14, 1922'.

2 SHEETS-SHEET 2.

INVEIIVHIJB fiarlyflaezfen ATTORNEYS or dry pulp.

HARRY LOEVEN, DOUGLAS, ARIZONA.

COMBINATION CRUSHER AND MILL.

Specification of Letters Patent. Patented Mar. 14, 1922.

Application flleiJuly 14, 1919. Serial No. 810,547.

ToaZZ whom it may concern: I

Be it. known that I, HARRY LOEVEN, a citizen of the United States, and aresident of Douglas, in the county of Cochise and State of Arizona, havemade certain new .and usefulImprovements in Combination Crushers andMills, of which the following is a speci fication. a

This invention is an improvement in milling, and one of the principalobjects of the invention is to provide a mill having means for crushing,milling, classifying, and screening, either wet or dry, ore or rock inone continuous operation. v

Another object of the invention is to provide a rotating drum in whichthe ore or rock isv milled and crushed, incorporating spaced bars'whichform the side walls of the drum and around which is a detachableencircling screen, the ore or rock being milled within the drum andpassing be-- tween the bars andthrough the screen into a trough to beconveyed'to anamalgamator or any other. process of further reduction.

Another object is to provide a shaft extending through the drum,rotating in the same'direction as and ata greater rate of speed than thedrum and carrying means for mauling the ore or rock within the drumuntil it'is fine enough'to pass through the spaces between the'bars tothe screen.

Another object of the invention is to provide anovel-means of vibratingthe screen.

Still another object is to provide an improved mill which will beextremely simple, durable, efficient in operation, and inexpensive tomanufacture and maintain, w ich will crush, mill classify andscreen oreand.

rock to any fineness desired andintoa wet With these and other objects.in view, which will become apparent, as the description proceeds, theinvention resides in the construction, combination and arrangement ofthe parts hereinafter more fully described and claimed and illustratedin the accompan'ying drawings, in which like characters,

of reference indicate like parts throughout the several figures, ofwhich: j

Figure 1 is a view showing in side eleva tion one form of combinationcrusher and mill embodying my invention.

Figure 2 is a view showing in transverse trou section the drum embodiedin the crusher and mlll shownin Fi re 1.,

- Figure 3 is a longltudinal section of the drum shown in Figure 2. v

Figure 4 is a detailed perspective view of one of the slug discscomprised in the drum shown in the preceding news.

In carrying out my. invention into use as a quartz mill,I provide asuitable framework indicated generally at 5, associated with which is adrum 6, a hopper 7, through;

which the-ore is dumped into the drum, a slug shaft8 extending axiallythrough the drum, .a trough 9, which receives the milled ore from thedrum, an amalgamato'r 10 into which the milled ore is introduced fromthe 'gh, .and driving mechanism which will appear in detail hereinafter.

The drum includes end walls 11 and 12, respectively, one of which closesthe rear end of the drum, except for an opening to receive the slugshaft 8, and the other of which closes'the front end of the drum exceptfor an opening 13 for receiving the discharge end of the hopper 7.Trunnion rings 14. are supported on the end walls of the tated. Theseare two pairs of rollers, each pair being fixed upon a rotatable shaft.(not

shown); While I have shown means for feeding the drum from oneend, asimilar means may beinstalled at the other end also, if desired. V

The slug shaft 8, extends axially through the; drum, being supported inbearings 16 and at its forward end is rotated at a great rate of speedby a belt 16 driven from a suitable source of power and running over apulley 17 carried by the shaft. The drive from the slug shaft goes from-a pulley 18 at the rear end of the shaft, through a belt 19' to arelatively large pulley 20 mounted on a counter shaft 21, and from thisshaft it goes through gears 22 and 23 to one of the shafts duced, issuch that the drum is driven in the same directionas the shaft and at. agreatly.

reduced rate of speed. A convenient esti- 0 that the amalgamator 10 ismounted on an inclined shaft 24, having a conical pulley at its lowerend taking the drive from a belt 25, running over a smaller pulley 26,carried at the rear end of anintermediate shaft 27, which may be drivenfrom a roller shaft'at its forward end as at 28 from the other shaft.The amalgamator is dIlVGIl at .a low rate of speed and maybe stopped atwill by slipping the belt 25 onto an idler pulley '29.

Fixed to the slug shaft 8, at spaced intervals, within the drum, arediscs or balance wheels 30, each of which has a plurality of yokes 31pivoted thereto as at 32. The yokes each support a slug 33, which slugis connected to the yoke by means of a hook or link 34. As the slugshaft rotates the slugs are thrown out by centrifugal forceand rotate inpaths slightly spaced'from the wall of the drum, thus inding and maulingthe ore which is fed into the drum until it is of a fine enoughconsistency to pass through the spaces between the bars 35 of which thewall of the drum is composed. These bars are spaced to allow passage ofthe milled ore through the wall of the drum, and certain of the bars .35are of a greater width than pthers, to lend rigidity and strength to thestructure.

Arranged around, the drum is a continuous screen 36, a space 37beingdefined between the screen and the 'outer surfaces of the bars 35-and 35. The milled ore-passed into this space through the wall of thedrum, by the action of gravity, and by the whipping of the slugs 33,runs through the screen and drops into the trough 9 from which it isdelivered to the amalgamator.

It may here be noted that this screen is detachable and may be replacedby any other screen of selected mesh, it being my purpose to use screensof various sizes of mesh, depending upon the purposes to which the millis to be put, and the material it is, in anyparticular instance, tohandle.

The ore which is not fine enough to pass through the screenfinds its wayback into the drum through the traps 38. The latter are formed byplacing bars 39 at the far edges of diametrically opposed openings orspaces 40, occurring between certain of the bars (the term far edgebeing considered in connection with the direction in which.

the drum is rotating, as indicated by the arrow in Figure 1,) and byplacing corresponding bars 41 on the inside of the drum, the latter barsproviding. beveled lips 42 which direct the coarser ore, caught by thebars 39, into the interior of the drum as the traps pass the upper pointof their path and start to descend. The lips also prevent the orepassing out into the space 37 through the openings or spaces 40 of thetraps.

In order to vibrate the screen a number of spaced vibrating rings 43 areattached to the inner side of the screen and against them a plurality ofplungers 44, set in certain of the bars, lay. These plungers have theirinner en s reduced to form shoulders abutting against plates 45 fastenedto the bars, in order to prevent the plungers from falling out of thebars into the drum. Some of the plungers may have their outer endsheaded as at 4. the heads resting between one of the vibrating rings anda ring 47 which encircles the drum and spaces the screen therefrom. Themovement of the ore,

as it is milled, over the inner ends of the vibrating plungers, causesthese plungers to convibrating the screen.

Although I have described the preferred embodiment of my invention, Imay desire to make such changes in the construction, combination andarrangement of parts thereof as do not depart from the spirit of theinvention and thescope of the appended claims.

I claim:-

1. A mill of the class described comprising a rotatable drum havingpervious walls, a screen surrounding the drum, in. spaced relationthereto, and means connected with the drum and adapted to be actuated bythe movement of the material within the drum for vibrating the screen.

2. A mill including a rotatable drum in which ore may be milled, ascreen associated with the drum, means for allowing the .milled ore topass from the drum to the screen, and means connected with the drum andoperable by themovement of the material to be milled for vibrating thescreen.

3. A mill comprising, a rotatable drum formed of longitudinallyextending spaced bars, vibrating rings movably supported on the drum, a,screen supported .on said rings and spaced from said drum, and plungersinterposed between the drumand rings in a manner to be angage'd andreciprocated by the material to be milled within the drum.

ently thereof, and slugs flexibly mounted on said shaft and adapted tobe thrown outwardly and travel in a circular path adpervious wall andspaced therefrom, and jacent the inner faces of the aforesaid returntraps within the inner wall, said spaced bars by centrifugal force.traps including spaced apart longitudinal 10 5. In a mill of the classdescribed, a drum bars, the innermost having one side edge 5 havingpervious inner cylindrical wall projecting beyond the other bar andbevthrough which ore milled in the drum may elled inwardly. pass, acylindrical screen surrounding said HARRY LOEVEN.

